Young Men's Institute - A Catholic fraternal organization, founded on 4 March, 1883, at San Francisco, California. Ysambert, Nicolas - French theologian. (1565-1642) Yucatán, Archdiocese of - Located in the Republic of Mexico; Campeche and Tabasco are its suffragans. Yukon, Prefecture Apostolic of - Occupies the extreme northwestern portion of the Dominion of Canada. Yun-nan - The Mission of Yun-nan includes the whole province, which is situated in the southwestern corner of China. Yuracaré Indians - A Bolivian tribe living between Santa Cruz de la Sierra and Cochabamba. Yakima Indians - A Shahaptian tribe formerly dwelling on the banks of the Columbia, the Wénatchee, and northern branches of the Yakima Rivers, in the east of Washington. Yamasee Indians - A Muskhogean tribe, mentioned frequently in the history of South Carolina, residing formerly near the Savannah River and in Florida. Yaqui Indians - A Cahita tribe, formerly dwelling near the Rio Yaqui. Yazoo Indians - A small tribe formerly living on the lower course of Yazoo River, Mississippi, in close connection with several other tribes, including the Tonica. Yellow Knives - A sub-arctic Déné tribe, called the Copper Indians by Hearne and other early English writers, and Red Knives by Mackenzie and Franklin. York, Ancient See of - The seat of metropolitan jurisdiction for the northern province. York, Use of - Principle in medieval canon law that while as regards judicial matters, as regards the sacraments, and also the more solemn fasts, the custom of the Roman Church was to be adhered to. Youghal - The Wardenship of Youghal, in the Diocese of Cloyne, was founded by Thomas, Eighth Earl of Desmond.